will convince more people his path forward is the right one. now romney has struggled to get his message across. there's a new politico poll out that has his personal unfavorability rating at 48% compared to the president's 47%. he has to appeal to all those undecided voters who don't like the president. campaign sources acknowledge that will be a tricky balancing act as he hits the president, he has to be wary of sounding too negative. charlie and norah? >> the president's hope for re-election, he is preparing for the debate in henderson, nevada, outside las vegas. and he made a surprise visit monday to a local campaign office and also called several volunteers on the phone to say thank you for helping his re-election effort. >> everything you do ends up making a huge difference in us being able to win nevada and win the election. so, just keep it up. >> nancy cordes is in henderson, covering the obama campaign. good morning. >> reporter: norah, good morning. while the president does his homework, the obama campaign team is working hard itself